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Ardynomys saskatchewaensis
Taxonomy
Sciurus saskatchewaensis was named by Lambe (1908). It is a 3D body fossil.
It was recombined as Prosciurus saskatchewaensis by Russell (1934), Wood (1937), Wood (1962), Wood (1980); it was recombined as Prosciurus saskatchewensis by Russell (1972); it was misspelled as Ardynomys saskatchewensis by Storer (1978); it was recombined as Ardynomys saskatchewaensis by Emry and Korth (1996), Storer (1996).
It was recombined as Prosciurus saskatchewaensis by Russell (1934), Wood (1937), Wood (1962), Wood (1980); it was recombined as Prosciurus saskatchewensis by Russell (1972); it was misspelled as Ardynomys saskatchewensis by Storer (1978); it was recombined as Ardynomys saskatchewaensis by Emry and Korth (1996), Storer (1996).
Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2015-11-02
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Sciurus saskatchewaensis Lambe |
| 1934 | Prosciurus saskatchewaensis Russell |
| 1937 | Prosciurus saskatchewaensis Wood |
| 1962 | Prosciurus saskatchewaensis Wood |
| 1972 | Prosciurus saskatchewensis Russell p. 20 figs. Fig. 5D-i;Fig. 6a-g |
| 1978 | Ardynomys saskatchewensis Storer p. 15 |
| 1980 | Prosciurus saskatchewaensis Wood |
| 1996 | Ardynomys saskatchewaensis Emry and Korth |
| 1996 | Ardynomys saskatchewaensis Storer |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Ardynomys saskatchewaensis Lambe 1908
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. S. Russell 1972 | Upper fourth premolar and molars with relatively simple patterns. Protocone prominent; hypocone rudimentary to moderate; protoloph a continuous crest; anteroloph connected buccally with paracone, forming with protoloph a closed valley; posteroloph connected buccally with metacone, but metaloph reaching only to the well-defined metaconule; mesostyle rudimentary or absent. Lower fourth premolar and molars with protruding metaconid and marginal protoconid and hypoconid; mesoconid distinct, connected to pro- toconid and hypoconid by M-shaped ectolophid; hypoconid and entoconid connected only by posterolophid, the hypolophid represented at most by a minute spur from the entoconid; mesostylid small or absent. | |
| J. E. Storer 1978 | Size of Ardynomys occidentalis; anterior and posterior cingula meet paracone and metacone, closing off valleys; protoconule absent, protoloph stout, complete; metaconule single, large, distinct, metaloph complete but low near protocone; strong cross-connection between metaconule and posterior cingulum; hypocone small;
q metaloph broader than protoloph. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1999, Ji et al. 2002, Lillegraven 1979, Hendy et al. 2009, Carroll 1988 | |||||
Age range: Chadronian or 37.00000 to 33.90000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chadronian | Canada (Saskatchewan) | Ardynomys saskatchewaensis (16919) | |
| Chadronian | USA (North Dakota) | Ardynomys saskatchewensis (16991) |